const source = [
    {
        province_name: "北京市",
        province_code: "110000",
        city_name: "北京市",
        city_code: "110000",
        district_name: "东城区",
        district_code: "110101",
    },
    {
        province_name: "北京市",
        province_code: "110000",
        city_name: "北京市",
        city_code: "110000",
        district_name: "西城区",
        district_code: "110102",
    },
    {
        province_name: "北京市",
        province_code: "110000",
        city_name: "北京市",
        city_code: "110000",
        district_name: "朝阳区",
        district_code: "110105",
    },
    {
        province_name: "北京市",
        province_code: "110000",
        city_name: "北京市",
        city_code: "110000",
        district_name: "海淀区",
        district_code: "110108",
    },
]

